Add missing serial commas

Also update one place where the wal_level "logical" was not added to an
error message.

src/backend/access/transam/xlog.c

@@ -9663,7 +9663,7 @@ do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
 			  errmsg("WAL level not sufficient for making an online backup"),
-				 errhint("wal_level must be set to \"archive\", \"hot_standby\" or \"logical\" at server start.")));
+				 errhint("wal_level must be set to \"archive\", \"hot_standby\", or \"logical\" at server start.")));
 
 	if (strlen(backupidstr) > MAXPGPATH)
 		ereport(ERROR,
@@ -9999,7 +9999,7 @@ do_pg_stop_backup(char *labelfile, bool waitforarchive, TimeLineID *stoptli_p)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
 			  errmsg("WAL level not sufficient for making an online backup"),
-				 errhint("wal_level must be set to \"archive\", \"hot_standby\" or \"logical\" at server start.")));
+				 errhint("wal_level must be set to \"archive\", \"hot_standby\", or \"logical\" at server start.")));
 
 	/*
 	 * OK to update backup counters and forcePageWrites

src/backend/access/transam/xlogfuncs.c

@@ -144,7 +144,7 @@ pg_create_restore_point(PG_FUNCTION_ARGS)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
 			 errmsg("WAL level not sufficient for creating a restore point"),
-				 errhint("wal_level must be set to \"archive\" or \"hot_standby\" at server start.")));
+				 errhint("wal_level must be set to \"archive\", \"hot_standby\", or \"logical\" at server start.")));
 
 	restore_name_str = text_to_cstring(restore_name);
 

src/backend/postmaster/postmaster.c

@@ -825,10 +825,10 @@ PostmasterMain(int argc, char *argv[])
 	}
 	if (XLogArchiveMode && wal_level == WAL_LEVEL_MINIMAL)
 		ereport(ERROR,
-				(errmsg("WAL archival (archive_mode=on) requires wal_level \"archive\", \"hot_standby\" or \"logical\"")));
+				(errmsg("WAL archival (archive_mode=on) requires wal_level \"archive\", \"hot_standby\", or \"logical\"")));
 	if (max_wal_senders > 0 && wal_level == WAL_LEVEL_MINIMAL)
 		ereport(ERROR,
-				(errmsg("WAL streaming (max_wal_senders > 0) requires wal_level \"archive\", \"hot_standby\" or \"logical\"")));
+				(errmsg("WAL streaming (max_wal_senders > 0) requires wal_level \"archive\", \"hot_standby\", or \"logical\"")));
 
 	/*
 	 * Other one-time internal sanity checks can go here, if they are fast.

src/backend/utils/adt/json.c

@@ -1347,7 +1347,7 @@ datum_to_json(Datum val, bool is_null, StringInfo result,
 		 tcategory == JSONTYPE_CAST))
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-		  errmsg("key value must be scalar, not array, composite or json")));
+		  errmsg("key value must be scalar, not array, composite, or json")));
 
 	switch (tcategory)
 	{

src/test/regress/expected/json.out

@@ -1152,11 +1152,11 @@ SELECT json_build_object(1,2);
 SELECT json_build_object(null,2);
 ERROR:  arg 1: key cannot be null
 SELECT json_build_object(r,2) FROM (SELECT 1 AS a, 2 AS b) r;
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT json_build_object(json '{"a":1,"b":2}', 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT json_build_object('{1,2,3}'::int[], 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 CREATE TEMP TABLE foo (serial_num int, name text, type text);
 INSERT INTO foo VALUES (847001,'t15','GE1043');
 INSERT INTO foo VALUES (847002,'t16','GE1043');

src/test/regress/expected/json_1.out

@@ -1148,11 +1148,11 @@ SELECT json_build_object(1,2);
 SELECT json_build_object(null,2);
 ERROR:  arg 1: key cannot be null
 SELECT json_build_object(r,2) FROM (SELECT 1 AS a, 2 AS b) r;
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT json_build_object(json '{"a":1,"b":2}', 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 SELECT json_build_object('{1,2,3}'::int[], 3);
-ERROR:  key value must be scalar, not array, composite or json
+ERROR:  key value must be scalar, not array, composite, or json
 CREATE TEMP TABLE foo (serial_num int, name text, type text);
 INSERT INTO foo VALUES (847001,'t15','GE1043');
 INSERT INTO foo VALUES (847002,'t16','GE1043');